CN2250441Y - Hydraulic compression tools for power distribution engineering - Google Patents

Abstract

A hydraulic compression tool for power distribution engineering with pressurization and labor saving, which mainly accommodates a movable valve stem in a low-pressure oil supply pipe, and sets a check valve between the low-pressure oil supply pipe and the pressure cylinder chamber in the movable valve stem, and a push rod extends from the end of the movable valve stem. When pressure is applied, the movable valve stem can be pushed toward the pressure control valve by the pressure in the pressure cylinder chamber. When the pressure in the pressure cylinder chamber exceeds the pressure set by the pressure control valve, the pressure control valve can be pushed open by the push rod at the end of the movable valve stem.

Description

Hydraulic compression tools for power distribution engineering

The utility model relates to a special tool, in particular to an improved hydraulic compression tool for power distribution engineering.

Hydraulic compression tools for power distribution engineering are mainly suitable for construction operations such as overhead power distribution engineering, underground lines, indoor wiring, bushings, terminals, crimping tube crimping, etc. No. 181730 "Manual oil pressure tool with oil turbidimeter" and No. 219695 "Manual oil pressure tool with forced return mechanism".

As shown in FIG. 8 , relevant hydraulic devices and pipelines are arranged in the base body 60 . One end of the base body 60 is provided with a C-shaped opening crimping joint 61 . Die 611, a fixed die 612 is installed on the other side, a fixed handle 62 is extended at the other end of the base body 60, and a pressure handle 63 is pivotally mounted above the base body 60 (the top shown in the figure). When the pressure handle 63 is clamped repeatedly, the movable die 611 can be pressed against the fixed die 612 by an extension rod (not shown in the figure) to carry out pressing. In addition, the hydraulic device in the base body 60 is equipped with Pressure control valve, the pressure control valve is set with different pressure values in the compression tools of different specifications, when the operator clamps the movable die 611 and the fixed die 612, and continuously exerts force to make the oil pressure When the set value is reached, the pressure control valve is opened to inform the operator that the set pressure has been reached, and the construction work is completed.

The hydraulic devices and pipelines configured inside this type of compression tool are shown in Figures 9 and 10. An oil groove 70 is provided on the side of the base body 60 near the fixed handle, and a column that can be manipulated by the pressure handle 63 is provided in the base body 60. Plug 71, the plunger 71 includes a low-pressure portion 711 with a larger diameter and a high-pressure portion 712 with a smaller diameter. On the side of the oil tank 70, an oil suction pipe 72 passes through two oil suction valves 721 and 722, and respectively connects with a low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74, while the other ends of the low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74 are provided with oil discharge valves 731 and 741 respectively. When the plunger 71 is moved by the pressure handle 63, the hydraulic oil in the oil tank 70 can Through the low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74, it is sent into the cylinder chamber 80 at the other end of the substrate 60; when the pressure in the cylinder chamber 80 exceeds the set value of the pressure control valve 75, the pressure control valve 75 is opened, so that The movement of the plunger 71 no longer pressurizes the cylinder chamber 80, and completes its construction work.

The operation mode and control mode of existing compression tools of this type are shown in the schematic diagrams of pipeline configuration in FIGS. 11-14 . As shown in Figure 11, the oil tank 70 connects the low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74 with the oil suction pipe 72 through two oil suction valves 721 and 722, and an oil discharge valve 731 is provided at the other end of the low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74 , 741 lead to the pressure cylinder chamber 80; when the plunger 71 is pulled outward (as shown in Figure 12), the two oil discharge valves 731, 741 are closed, and the hydraulic oil in the oil tank 70 enters through the two oil suction valves 721, 722 In the low pressure oil supply pipe 73 and the high pressure oil supply pipe 74; and when the plunger 71 is pressed inward (as shown in Figure 13), the two oil suction valves 721, 722 are closed, and the low pressure oil supply pipe 73 and the high pressure oil supply pipe 74 The hydraulic oil pushes the oil discharge valves 731 and 741 respectively to enter the cylinder chamber 80 and pushes the piston 81. During the pushing stroke of the plunger 71, the pressure in the cylinder chamber 80, the low-pressure oil supply pipe 73 and the high-pressure oil supply pipe 74 are equal. The same; through the repeated action of the plunger 71 (that is, repeating the steps in Figures 12 and 13), the hydraulic oil in the oil tank 70 is continuously drawn into the cylinder chamber 80, and the extension rod pushed by the piston 81 (in the figure) Not shown) Push the movable die to the fixed die, and compress the workpiece clamped in the C-shaped opening crimping joint; when the force applied to the workpiece reaches the set value, the plunger 71 still continues to operate 14, the high-pressure part 712 of the plunger 71 uses the hydraulic oil in the high-pressure oil supply pipe 74 to push the oil discharge valve 741 and send it into the cylinder chamber 80. At this time, the cylinder chamber 80 and the high-pressure supply pipe The pressure in the oil pipe 74 is already higher than the set value, and when the hydraulic oil pressure provided by the low-pressure part 711 of the plunger 71 to the low-pressure oil supply pipe 73 is equal to the set value, the pressure in the low-pressure oil supply pipe 73 cannot push the drain. The oil valve 731 will open the pressure control valve 75, and the momentary pressure reduction of the pressure handle will inform the operator that the set pressure has been reached and the pressure application operation has been completed.

As mentioned above, in the existing oil hydraulic compression tool for power distribution engineering, when the pressure in the cylinder chamber 80 reaches the set value, the high pressure part 712 of the plunger 71 must bear the pressure greater than the set value, while the low pressure part The 711 needs to bear the pressure equivalent to the set value, so that the operator must operate the pressurized handle very laboriously to provide the appropriate force, especially when the operator is located above the utility pole or above the high voltage transmission tower. power is more difficult.

In view of the above problems, the utility model aims to provide a pressurized and labor-saving hydraulic compression tool for power distribution engineering.

The utility model provides an oil pressure compression tool for power distribution engineering, which is provided with an oil groove on the side of the base body close to the fixed handle, and a plunger which can be controlled by the pressurized handle is arranged in the base body, and the plunger includes a large diameter The low-pressure section and the high-pressure section with a small diameter are connected to the low-pressure oil supply pipe and the high-pressure oil supply pipe respectively through an oil suction pipe on one side of the oil tank through the two oil suction valves, and the other ends of the low-pressure oil supply pipe and the high-pressure oil supply pipe are respectively provided. The oil discharge valve in the cylinder chamber, when the plunger is operated by the pressurized handle, can send the hydraulic oil in the oil groove into the cylinder chamber at the other end of the base body through the low-pressure oil supply pipe and the high-pressure oil supply pipe. It is characterized in that:

A movable valve stem is accommodated and assembled at the place where the low-pressure oil supply pipe connects with the cylinder chamber. The end of the movable valve stem is provided with a push rod that pushes against the pressure control valve. At the same time, the low-pressure oil supply pipe leads to the oil discharge valve of the cylinder chamber. in the moving valve stem;

In addition, in the above-mentioned hydraulic compression tool for power distribution engineering, the movable valve stem is in the shape of a column, and a push rod can be extended from the end of the movable valve stem. The center of the movable valve stem is a central hole, and the outer end of the central hole is an enlarged The accommodating tank, the low-pressure oil supply pipe leading to the oil discharge valve of the cylinder chamber is assembled in the aforesaid accommodating tank, and the end of the moving valve stem penetrates to the outside of the moving valve stem through holes on both sides.

When the pressure in the hydraulic compression tool for power distribution engineering of the utility model exceeds the set value of the pressure control valve, the moving valve rod will generate displacement in the low-pressure oil supply pipe, and the pressure control valve will be opened by the push rod. , and complete the construction work, so that the operator can save the force on the pressurized handle, and does not need to apply force to overcome the pressure generated in the two oil supply pipelines to open the pressure control valve, so it is easier and more convenient to use.

Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing.

Brief description of the drawings

Fig. 1 is a cross-sectional view of the structure of the hydraulic device in the base body of the present invention.

Fig. 2 is another angle sectional view of the hydraulic device in the base body of the present invention.

Fig. 3 is an enlarged sectional view of the movable valve stem of the present invention.

4-7 are schematic diagrams of pipeline configuration and operating states of the utility model.

Fig. 8 is a top view of a conventional compression tool.

Fig. 9 is a cross-sectional view of the structure of the hydraulic device in the base body of the conventional compression tool.

Fig. 10 is another angle sectional view of the hydraulic device in the base body of the conventional compression tool.

11 to 14 are schematic diagrams of pipeline configuration and operating states of existing compression tools.

Fig. 1 is the sectional view of the structure of the hydraulic device in the utility model base 10. It can be seen that the basic structural configuration of the hydraulic device of the present utility model is almost identical to the prior art structure shown in Fig. 9, and the utility model substrate of Fig. 2 It can be seen from another angle sectional view of the oil pressure device in Fig. 10 that its main difference is that a movable valve rod 40 is housed in the low-pressure oil supply pipe 23 of the present utility model compared with the prior art structure shown in Fig. 10, and the remaining parts The structural configuration is also almost identical. As shown in Figures 1 and 2, an oil groove 20 is provided on the side of the base body 10 close to the fixed handle (not shown), and a plunger 21 that can be manipulated by a pressurized handle is provided in the base body 10. The plunger 21 includes a diameter The larger low-pressure part 211 and the smaller-diameter high-pressure part 212 have an oil suction pipe 22 passing through two oil suction valves 221 and 222 on the side of the oil tank 20, and respectively connect the low-pressure oil supply pipe 23 and the high-pressure oil supply pipe 24, and the low-pressure oil supply pipe 23 and the other end of the high-pressure oil supply pipe 24 are provided with oil discharge valves 231 and 241 respectively. When the plunger 21 is actuated by the pressure handle, the hydraulic oil in the oil tank 20 can be sent to into the cylinder chamber 30 at the other end of the substrate 10; when the pressure in the cylinder chamber 30 exceeds the set value of the pressure control valve 25, the pressure control valve 25 is opened, so that the movement of the plunger 21 no longer presses the cylinder. chamber 30 to complete its construction work.

FIG. 3 is an enlarged cross-sectional view of the movable valve rod 40 of the present invention. As shown in the figure, the movable valve rod 40 is in the shape of a column, and a push rod 41 extends from the end thereof. The center of the movable valve rod 40 is a central hole 42, and the outer end of the central hole 42 is an enlarged accommodation groove 43. The end is penetrated to the outside of the movable valve rod 40 by the holes 44 on both sides.

4-7 are schematic diagrams of pipeline configuration and operation mode of the utility model. As shown in Figure 4, the oil tank 20 connects the low-pressure oil supply pipe 23 and the high-pressure oil supply pipe 24 through two oil suction valves 221 and 222 through the oil suction pipe 22, and at the same time, oil discharge valves are respectively provided at the other ends of the low-pressure oil supply pipe 23 and the high-pressure oil supply pipe 24. 231 and 241 lead to the cylinder chamber 30, but a movable valve stem 40 is accommodated and assembled at the place where the low-pressure oil supply pipe connects with the cylinder chamber 30, and the oil discharge valve 231 is assembled in the accommodating groove 43 of the movable valve stem 40;

When the plunger 21 is pulled outward as shown in Figure 5, the two oil discharge valves 231 and 241 are closed, and the hydraulic oil in the oil tank 20 enters the low pressure oil supply pipe 23 and the high pressure oil supply pipe 24 through the two oil suction valves 221 and 222 middle,

When the plunger 21 is pressed inward as shown in Figure 6, the two oil suction valves 221, 222 are closed, and the hydraulic oil in the low-pressure oil supply pipe 23 and the high-pressure oil supply pipe 24 respectively pushes the oil discharge valves 231, 241 to enter Press the cylinder chamber 30 to push the piston 31. During the pushing stroke of the plunger 21, the pressures in the cylinder chamber 30, the low pressure oil supply pipe 23 and the high pressure oil supply pipe 24 are all the same;

The plunger 21 moves repeatedly (that is, repeats the steps in Figures 5 and 6), so that the hydraulic oil in the oil tank 20 can be continuously pumped into the cylinder chamber 30, and the extension rod (not shown) pushed by the piston 31 will The movable die pushes to the fixed die, and compresses the workpiece clamped in the C-shaped open crimping joint;

When the force exerted by the movable die on the workpiece reaches the set value and the plunger 21 continues to operate, as shown in FIG. Open the oil discharge valve 241, and the hydraulic oil in the high-pressure oil supply pipe 24 is sent into the cylinder chamber 30. At this time, the pressure in the cylinder chamber 30 and the high-pressure oil supply pipe 24 has reached the set value. At this time, the valve stem 40 is moved. That is, it is moved to the pressure control valve 25 by the pressure in the cylinder chamber 30, and the pressure control valve 25 is pushed open by the push rod 41. The low-pressure part 211 of the plunger 21 is not subjected to any pressure at all, and the momentary pressure drop of the pressurization handle informs the operator that the set pressure has been reached and the pressurization operation has been completed.

In the utility model, by setting the movable valve stem 40, when the pressure in the cylinder chamber 30 reaches the set value of the pressure control valve 25, the push rod 41 of the movable valve stem 40 can open the pressure control valve 25, and the pressure control valve 25 can be opened when the pressure is controlled. After the valve 25 is opened, because the pressure in the cylinder chamber 30 is higher than the set value of the pressure control valve 25, the push rod 41 of the movable valve rod 40 is continuously pushed against the pressure control valve 25, so that the pressure control valve 25 keeps Open state, so that the operator is more labor-saving when using.

Claims (2)

1. distribution engineering oil pressure tool of compression, it is provided with an oil groove at matrix by the fixed handle side, and in matrix, be provided with the plunger that to control by pressurized handgrip, this plunger includes bigger low voltage section of diameter and the less high-voltage section of diameter, in oil groove one side with a fuel sucking pipe through two oil sucting valves, and be connected low pressure rail and high pressure rail respectively, the end in addition of low pressure rail and high pressure rail is respectively equipped with towards the draining valve of cylinder pressure chamber again, when the pressurized handle of plunger moves, hydraulic oil in the oil groove can be sent in the cylinder pressure chamber of other end of matrix through low pressure rail and high pressure rail, be it is characterized in that:

Be connected at the low pressure rail that place, cylinder pressure chamber is ccontaining to be assembled with one and to move valve rod, this moves valve stem end and is provided with the push rod of pushing and pressing on pressure controlled valve, and the low pressure rail draining valve system that leads to the cylinder pressure chamber is assembled in the mobile valve rod simultaneously.

2. distribution engineering oil pressure tool of compression according to claim 1, it is characterized in that: wherein mobile valve rod is a column, extend a push rod at its end, mobile valve rod central authorities are a central hole, the outer end of this central hole is a containing groove that enlarges, the draining valve that the low pressure rail leads to the cylinder pressure chamber is assembled in the aforementioned containing groove, and mobile valve stem end then is through to the mobile valve rod outside with two side holes.

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